What is Sharknado and what is it about?

Sharknado is a tongue-in-cheek, made-for-TV horror franchise, directed by Anthony C. Ferrante and written by Thunder Levin — though Scotty Mullen has written Sharknado 5.

It imagines a world where angry sharks begin falling from the sky after an epidemic of tornadoes, containing the sea predators, breaks out.

In each movie Fin, an ex-surfer, and his estranged wife April battle to rid certain locations — like planes, subways and casinos — of shark-infested water, joined by a variety of comrades who inevitably die.

The first one arrived in 2013, and delighted audiences have been treated to one per year ever since.